Concrete Railroad Tie Development in Canada


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Title: Concrete Railroad Tie Development in Canada

Author(s): J. G. White

Publication: Special Publication

Volume: 93


Appears on pages(s): 287-312

Keywords: alkali-aggregate reactions; economics; prestressed concrete; railroad ties; reviews; structural design; tests

Date: 9/1/1986

The paper reviews the history of development of concrete track ties in Canada with particular reference to the special requirements caused by Canadian climate and geography. Information is given on the extensive concrete tie testinq by CM since 1920 and the more recent CP tests since 1974. Details are also provided on the current CN, CP and QNS&L track tie designs. Information is provided on the current 1985 pad and tangent tie tests jointly sponsored by CN, Pandrol and Genstar Costain. Details are provided of the special precautions taken to minimize the risk of alkali/aggregate reaction in concrete ties which includes the pre-qualification of aggregates and the use of a low alkali Type 30 cement. Information is given on the latest methods of economic analysis of concrete ties together with the status report on concrete switch tie development, bridge tie development and the forthcoming AAR/AMTRAK energy saving study on concrete ties. An outline of future developments is also given.